Pump inlet filter

Abstract

The utility model discloses a machine pump inlet filter which comprises a T-shaped filter. The T-shaped filter comprises a feeding pipeline and a discharging pipeline which are transversely arranged, a back washing pipeline which is vertically arranged at the upper ends of the feeding pipeline and the discharging pipeline, and a water inlet washing pipe which is arranged on the back washing pipeline, and is characterized in that a liquid accumulation tank is arranged at the bottom of the T-shaped filter, a blow-off pipe is arranged on one side of the liquid accumulation tank, and a water outlet pipe is arranged on the other side of the blow-off pipe; a blow-off valve is arranged on the blow-off pipe, sundries filtered by the T-shaped filter are stored in the liquid accumulation tank, and sewage generated in the backwashing process can be directly discharged outwards through the blow-off pipe. The pump can ensure that the product quality is not affected in the medium conveying process, effectively filter impurities, avoid damage to the pump and ensure long-term stable and continuous operation of the pump.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, and particularly relates to a pump inlet filter. Background Art

[0002] At present, pumps are necessarily applied during the operation of large equipment, and a pre-filter must be installed at the inlet of the pump. Generally, the pre-filter is a T-shaped filter made of metal. Since it has no sewage discharge structure and the whole pipeline is not convenient to disassemble, when the pre-filter of the pump needs to be cleaned, it can only be cleaned by the flowing water inside. Therefore, it is not easy to clean and cannot be cleaned thoroughly, resulting in some impurities and particles remaining in the filter and unable to be discharged. After these impurities and particles accumulate on one side of the filter element and flow into the pump during the later operation, it will cause damage and wear to the pump body of the pump. Therefore, the pre-filter of the pump needs to be improved. Summary of the Invention

[0003] In order to solve certain or some technical problems existing in the prior art, the purpose of this application is to provide a pump inlet filter, which can ensure that the quality of the product is not affected during the process of transporting the medium, effectively filter impurities, avoid damage to the pump, and ensure the long-term stable and continuous operation of the pump.

[0004] To solve the above-mentioned existing technical problems, the following technical solutions are adopted in this application:

[0005] A pump inlet filter includes a T-shaped filter. The T-shaped filter includes a horizontally arranged feed pipe and a discharge pipe, a backwash pipe vertically arranged at the upper ends of the feed pipe and the discharge pipe, and a water inlet flushing pipe arranged on the backwash pipe. A liquid accumulation tank is provided at the bottom of the T-shaped filter. A sewage discharge pipe is provided on one side of the liquid accumulation tank, and a sewage discharge valve is provided on the sewage discharge pipe. The sundries filtered by the T-shaped filter are stored in the liquid accumulation tank, and the sewage generated during the backwash process can be directly discharged outwards through the sewage discharge pipe.

[0006] Preferably, a detachable end cover is provided at the bottom of the liquid accumulation tank, and the end cover and the liquid accumulation tank are connected by threads or bolts.

[0007] Preferably, an exhaust device is provided at the top of the backwash pipe, and the gas generated in the T-shaped filter can be directly discharged outwards through the exhaust device.

[0008] Preferably, the exhaust device includes a pipe communicated with the backwash pipe and a valve arranged on the pipe.

[0009] Preferably, the valve is a three-way valve and is installed on the water inlet flushing pipe.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] Through the combination of the liquid accumulation tank and the sewage discharge pipe with a sewage discharge valve, the granular impurities filtered by the T-shaped filter can sink into the liquid accumulation tank for storage, thereby avoiding the impact and adhesion of large particle impurities on the filter element. After the filter screen is backwashed through the water inlet flushing pipe, the impurities and part of the sewage flushed down can also directly enter the T-shaped filter, and then be discharged outward through the sewage discharge pipe after opening the sewage discharge valve, thus solving the problem that the impurities and particles filtered by the filter element accumulate on one side of the filter element, avoiding the damage and wear of the pump body caused by flowing into the pump during the later operation process, ensuring that the quality of the product is not affected during the process of transporting the medium, and ensuring the long-term stable and continuous operation of the pump. Brief Description of the Drawings

[0012] Figure 1 is the overall structural schematic diagram of the present utility model;

[0013] Figure 2 is the schematic diagram of the threaded connection end cover in the present utility model;

[0014] Figure 3 is the schematic diagram of the flange structure end cover in the present utility model;

[0015] In the figure: 1. T-shaped filter; 11. Discharge pipeline; 12. Water inlet flushing pipe; 13. Backwashing pipeline; 14. Feed pipeline; 2. Exhaust device; 21. Valve; 3. Liquid accumulation tank; 4. End cover; 5. Sewage discharge valve; 6. Sewage discharge pipe. Detailed Embodiments

[0016] Next, in combination with the drawings and specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, the following-described embodiments or technical features can be arbitrarily combined to form new embodiments.

[0017] In the description of the present application, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0018] The terms "first", "second", etc. in this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / ", generally represents an "or" relationship between the associated objects before and after.

[0019] As Figure 1 shown, a pump inlet filter includes a T-shaped filter 1. The T-shaped filter 1 includes a feed pipe 14 and a discharge pipe 11 arranged horizontally, a backwash pipe 13 vertically arranged at the upper ends of the feed pipe 14 and the discharge pipe 11, and a water inlet flush pipe 12 arranged on the backwash pipe 13. A liquid accumulation tank 3 is provided at the bottom of the T-shaped filter 1. A sewage discharge pipe 6 is provided on one side of the liquid accumulation tank 3, and a sewage discharge valve 5 is provided on the sewage discharge pipe 6. The sundries filtered by the T-shaped filter 1 are stored in the liquid accumulation tank 3, and the sewage generated during the backwash process can be directly discharged outward through the sewage discharge pipe 6.

[0020] For all the front-end conveying pipelines of large chemical equipment during the liquid conveying process, a large T-shaped filter 1 is installed on the conveying pipeline. After a period of operation, the T-shaped filter 1 at the pump inlet needs to reverse flush the internal filter element through the opening of the reverse flush pipeline 13 at the interface end of the top of the reverse flush pipeline 13, so as to ensure the filtering effect of the filter element and the liquid flow effect, and avoid the problem of insufficient liquid flow caused by impurities. However, the impurities flushed from the filter element by the reverse flush pipeline 13 and the impurities filtered by the filter element itself essentially remain in the pipeline. Although the sewage can flow along the pipeline after filtration, the impurities cannot be discharged. To solve this problem, the existing T-shaped filter 1 is modified. A through hole with a diameter of about 10 - 15 cm is cut at the bottom of the T-shaped filter 1 by cutting, and then a liquid accumulation tank 3 is welded below the through hole. The liquid accumulation tank 3 is located on one side of the feed pipeline 14 close to the internal filter element. Then, a sewage discharge pipe 6 with a sewage discharge valve 5 is connected to one side of the liquid accumulation tank 3. When the T-shaped filter 1 filters out the impurities in the liquid, the granular impurities can sink into the liquid accumulation tank 3 for storage, thus avoiding the impact and adhesion of large particle impurities on the filter element. After the filter screen is reversely flushed by the water inlet flush pipe 12, the flushed impurities and part of the sewage can also directly enter the T-shaped filter 1, and then be discharged outward through the sewage discharge pipe 6 by opening the sewage discharge valve 5. Thus, the problem that the impurities and particles filtered by the filter element accumulate on one side of the filter element is solved, which can avoid the damage and wear of the pump body caused by flowing into the pump during the later operation process, ensure that the quality of the product is not affected during the conveying medium process, and ensure the long-term stable and continuous operation of the pump.

[0021] Furthermore, it is improved that a detachable end cover 4 is provided at the bottom of the liquid accumulation tank 3, and the end cover 4 and the liquid accumulation tank 3 are connected by threads or bolts.

[0022] An end cover 4 is installed at the bottom of the liquid accumulation tank 3. The end cover 4 generally has two forms. The first is the end cover 4 connected by threads. As Figure 2 shown, the two are connected and sealed by threads. When connected and sealed by threads, generally two U-shaped handles are installed on the end cover 4, which can facilitate the disassembly and rotation of the end cover 4; the second is the flange structure. As Figure 3 shown, the end cover 4 and the liquid accumulation tank 3 are fastened by bolts. At this time, generally a sealing ring is installed inside the end cover 4 to play a sealing role.

[0023] Furthermore, it is improved that an exhaust device 2 is provided at the top of the reverse flush pipeline 13, and the gas generated in the T-shaped filter 1 can be directly discharged outward through the exhaust device 2.

[0024] During the process of filtering liquid through the T-shaped filter 1, in some cases, gas will be generated inside the pipeline. This part of the gas directly enters the pump, which is likely to cause the pump to run idly. Therefore, an exhaust device 2 is installed at the top of the backwash pipeline 13, so that the gas flowing through the pipeline can be directly discharged outward by opening the exhaust device 2 after entering the T-shaped filter 1.

[0025] Furthermore, it is further improved that the exhaust device 2 includes a pipeline communicated with the backwash pipeline 13 and a valve 21 provided on the pipeline; the valve 21 is a three-way valve and is installed on the water inlet flushing pipe 12.

[0026] Combining the water inlet flushing pipe 12 with the water inlet flushing pipe 12, by directly replacing the original water inlet valve 21 with a three-way valve, the replaced three-way valve 21 is used as the common water inlet and exhaust valve 21, and the water inlet flushing pipe 12 is used as the exhaust pipeline. The modification of the whole device is smaller and the function is more comprehensive.

[0027] The above-mentioned implementation manners are only the preferred implementation manners of the present application, and cannot be used to limit the scope of protection of the present application. Any non-substantive changes and substitutions made by those skilled in the art on the basis of the present application belong to the scope of protection required by the present application.

Claims

1. A pump inlet filter, comprising a T-shaped filter (1), wherein the T-shaped filter (1) includes a horizontally arranged feed pipe (14) and a discharge pipe (11), a backwash pipe (13) vertically arranged at the upper ends of the feed pipe (14) and the discharge pipe (11), and a water inlet flush pipe (12) arranged on the backwash pipe (13), characterized in that: A liquid accumulation tank (3) is provided at the bottom of the T-shaped filter (1). A sewage discharge pipe (6) is provided on one side of the liquid accumulation tank (3), and a sewage discharge valve (5) is provided on the sewage discharge pipe (6). Debris filtered by the T-shaped filter (1) is stored in the liquid accumulation tank (3), and sewage generated during the backwashing process can be directly discharged outward through the sewage discharge pipe (6).

2. The inlet filter of a machine pump according to claim 1, characterized in that: A detachable end cover (4) is provided at the bottom of the liquid accumulation tank (3), and the end cover (4) and the liquid accumulation tank (3) are connected by threads or bolts.

3. A pump inlet filter according to claim 1 or 2, characterized in that: An exhaust device (2) is provided at the top of the backwashing pipeline (13), and gas generated in the T-shaped filter (1) can be directly discharged outward through the exhaust device (2).

4. The inlet filter of a machine pump according to claim 3, characterized in that: The exhaust device (2) includes a pipeline communicated with the backwashing pipeline (13) and a valve (21) provided on the pipeline.

5. The inlet filter of a pump according to claim 4, characterized in that: The valve (21) is a three-way valve and is installed on the water inlet flushing pipe (12).

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